What was an argument used to try to justify slavery?

The southern economy hugely depended on the use of slavery.

One important argument the South saw reasonable and justifiable to not abolish slavery was its dependence for the growth of its economy. In other words, the South's economy was maintained due to the work of the enslaved.

The South's economy was agriculturally based. They did not have factories and large businesses like the North did. They relied on farms and the growing of crops. There were many farms and plantations with too many crops to harvest for the owner, and that's when slavery came in. Not only did Slaves work on farms and plantations, they did manual labor including construction.

Because the southern economy was heavily dependent on slavery, southern slaveholders fought hard to keep slaves. This argument was probably the most reasonable reason to keep slavery made by the South, although it is just as cruel as any other reason for servitude.

To summarize: the South's economy would not survive without slavery, and southern citizens would not make as much money without them.

-Acquaintance

"the gulf of tonkin resolution in 1967".

the gulf of tonkin resolution (officially called southeast asia resolution, public law 88-408) is a law issued by the congress of the united states of america on august 7, 1964, in which president lyndon b. johnson was authorized1 to act in a comprehensive manner against the democratic republic of vietnam, which he accused of aggressions against us ships in the gulf of tonkin, where the resolution takes its name. the gulf of tonkin resolution is of historical importance because it gave authorization to the us president. lyndon b. johnson, without a formal declaration of war by congress, to use military force in southeast asia.